一种基于DV-HOP改进的无线传感器网络定位算法

针对无线传感器网络中经典定位算法DV-HOP定位精度低的缺陷，提出改进算法。该算法采用新的方式计算未知节点与锚节点的距离，提出锚节点信任度的概念，并利用加权最小二乘法计算节点坐标。Matlab仿真实验结果表明，在相同网络环境下，该算法能有效减小距离计算带来的定位误差，提高定位精度。

An Improved Localization Algorithm Based on DV-HOP in WSN

To solve the problem of low localization accuracy in traditional DV-Hop, an improved localization algorithm in WSN was proposed. The algorithm proposed three improvements, including a new calculation of distance from anchor nodes to unknown nodes, the concept of confidence level of anchor nodes, and coordinate calculation of unknown nodes by using Weighted Least Square Estimates. Results of the Matlab simulation showed that the improved algorithm reduces the location error by distance calculation effectively and has better performance in localization accuracy at the same network environment.